12K8
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BrandGeneral Electric
ClassTriode-Hexode Converter
BaseOctal
Filament12.6V @ 150mA
Construction
Primary TypeTriode-Hexode
EnvelopeMetal Shell, MT-8
Base MaterialPhenolic
Sections2
Filament / Heater
Heater NotesA-C or D-C
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation0.75 W
Grid 2 Voltage150 V
Cathode Current16 mA
Audio Performance
Key Features
- Metal type
- Coated Unipotential Cathode
- Superheterodyne circuits
- All-wave type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Converter Service (100V) | 100V | 325 | 400000 | - | 2.3mA |
| Converter Service (250V) | 250V | 350 | 600000 | - | 2.5mA |
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